Stereoscopic display device and dashboard using the same

ABSTRACT

Provided is a stereoscopic display device, including: a base substrate transmitting an incident beam; and a three-dimensional effect forming part on a first surface of the base substrate, wherein the three-dimensional effect forming part has a pattern, the pattern having multiple pattern units arranged in a concentric circular, elliptical or polygonal radial form, each of the pattern units having an inclined surface having an inclination angle with respect to the first surface, and wherein when an incident beam is incident to a central portion of the pattern, the pattern guides the incident beam in a first surface direction toward which the first surface looks or a second surface direction toward which a second surface opposite to the first surface looks, thereby displaying a line-shaped beam having a three-dimensional effect in a first path resulting a pattern arrangement direction.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority under 35 U.S.C. §119 to Korean PatentApplication Nos. 10-2014-0012058, filed on Feb. 3, 2014 and10-2014-0012574, filed on Feb. 4, 2014 whose entire disclosures arehereby incorporated by reference.

BACKGROUND

1. Field

Embodiments of the present disclosure relate to a lighting device usingan LED (Light Emitting Diode), and more particularly, to a stereoscopicdisplay device for displaying a line-shaped beam having athree-dimensional effect using an oriented incident beam, and adashboard using the stereoscopic display device.

2. Background

An LED (Light emitting diode) is an element for converting an electricalsignal into light using a compound semiconductor. It is advantageous inthat a light source using the LED element has low power consumption, ahigh color temperature, a long lifespan and the like compared to aconventional light source.

One example of a conventional lighting device using an LED light sourceis disclosed in Korean Patent Laid-Open Publication No. 10-2012-0009209.The lighting device disclosed in the publication is an edge lightingtype backlight unit in which a plurality of LED light sources isarranged at one side of a light guide plate, and is interposed between areflective film and a light guide plate to diffuse light leaked upwardsin left and right directions, thereby minimizing the deviation ofluminous of a lighting plan.

However, the conventional art disclosed in the publication isdisadvantageous in that there is a limit in making a thickness of thelighting device thin due to a thickness of the light guide plate used inthe lighting device, it is difficult to apply the light guide plate tothe lighting device or a display device because the light guide plate isnot flexible, and a product design cannot be easily changed.

Also, most of conventional lighting devices using the LED light source,which are devices providing simple plan illumination, have not beendeveloped as lighting devices having a new function such as an effectthat the shape and the three-dimensional effect of light are changedaccording to each viewing angle. That is, in the recent mark forlighting devices, demand for a lighting produce having a new functionhas been considerably increasing in a competitive atmosphere ofmanufacturers. However, the manufacturers have not met this demand.

BRIEF DESCRIPTION OF THE DRAWINGS

The embodiments will be described in detail with reference to thefollowing drawings in which like reference numerals refer to likeelements wherein:

FIG. 1 is a perspective view showing a stereoscopic display deviceaccording to an embodiment of the present disclosure;

FIG. 2 is a plan view showing the stereoscopic display device of FIG. 1;

FIG. 3 is a cross-sectional view taken along line III-III of thestereoscopic display device of FIG. 2;

FIG. 4 is a partially enlarged plan view illustrated for explaining anoperational principle of the stereoscopic display device of FIG. 1;

FIG. 5 is a partially enlarged cross-sectional view illustrated forexplaining an operational principle of the stereoscopic display deviceof FIG. 1;

FIG. 6 is a plan view illustrated for explaining an operationalprinciple of the stereoscopic display device of FIG. 1;

FIG. 7 is a plan view illustrated for explaining a modified example ofthe stereoscopic display device of FIG. 1;

FIG. 8 is a cross-sectional view showing a stereoscopic display deviceaccording to another embodiment of the present disclosure;

FIG. 9 is a cross-sectional view showing a stereoscopic display deviceaccording to a further embodiment of the present disclosure;

FIG. 10 is a cross-sectional view showing a stereoscopic display deviceaccording to yet another embodiment of the present disclosure;

FIGS. 11 to 13 are exemplary views for a pattern of a three-dimensionalforming part that can be applied to the stereoscopic display device ofFIG. 1;

FIG. 14 is a partially enlarged plan view showing a stereoscopic displaydevice according to still another embodiment of the present disclosure;

FIG. 15 is a partially enlarged plan view showing a stereoscopic displaydevice according to still another embodiment of the present disclosure;

FIG. 16 is a partially plan view illustrated for explaining anoperational principle of the stereoscopic display device of FIG. 15;

FIG. 17 is a plan view showing a stereoscopic display device accordingto still another embodiment of the present disclosure;

FIG. 18 is a plan view showing a stereoscopic display device(hereinafter briefly referred to as ‘display device’ according to stillanother embodiment of the present disclosure (hereinafter brieflyreferred to as ‘display device’);

FIG. 19 is a front view of the display device of FIG. 18;

FIG. 20 is a partially exploded front view showing a modified example ofthe display device of FIG. 19;

FIG. 21 is a view showing various examples for a radial pattern of thedisplay device of FIG. 19;

FIG. 22 is an exemplary view showing an operational state of the displaydevice of FIG. 18;

FIG. 23 is an exemplary view of a dashboard in which the display deviceof FIG. 22 is used as a background member;

FIG. 24 is a partially enlarge plan view showing the main portion of astereoscopic display device according to still another embodiment of thepresent disclosure;

FIG. 25 is an exemplary view showing an operational state of the displaydevice of FIG. 24;

FIG. 26 is a partially enlarged plan view showing the main portion of astereoscopic display device according to still another embodiment of thepresent disclosure;

FIG. 27 is a plan view of a stereoscopic display device according tostill another embodiment of the present disclosure;

FIG. 28 is an exemplary view showing an operational state of the displaydevice of FIG. 27;

FIG. 29 is a plan view of a stereoscopic display device according tostill another embodiment of the present disclosure;

FIG. 30 is an exemplary view showing an operational state of the displaydevice of FIG. 29; and

FIG. 31 is a sketchy cross-sectional view of a dashboard according to anembodiment of the present disclosure.

DETAILED DESCRIPTION

Hereinafter, the embodiments of the present disclosure that an ordinaryperson skilled in the art can implement will be described with referenceto the accompanying drawings. The embodiments in the specification andthe constructions shown in the drawings are provided as a preferredembodiment of the present disclosure, and it should be understood thatthere may be various equivalents and modifications which couldsubstitute at the time of filing. In addition, when it comes to theoperation principle of the preferred embodiments of the presentdisclosure, when the known functions or functions are seemed to makeunclear the subject matters of the present disclosure, they will beomitted from the descriptions of the disclosure. The terms below aredefined in consideration of the functions of the present disclosure, andthe meaning of each term should be interpreted by judging the wholeparts of the present specification, and the elements having the similarfunctions and operations of the drawings are given the same referencenumerals. As used herein, the singular forms are intended to include theplural forms as well, unless the context clearly indicates otherwise.

Moreover, a stereoscopic display device according to the presentdisclosure is a device that can display stereo backgrounds orstereoscopic images. For example, the stereoscopic display device can beapplied to a dashboard for a vehicle, and a dashboard for home orindustrial equipment or the like.

FIG. 1 is a perspective view showing a stereoscopic display deviceaccording to an embodiment of the present disclosure. FIG. 2 is a planview showing the stereoscopic display device of FIG. 1.

Referring to FIGS. 1 and 2, a stereoscopic display device 100 accordingto the present embodiment includes a base substrate 10 and athree-dimensional effect forming portion 20. The base substrate 10 andthe three-dimensional effect forming part 20 correspond to a displaydevice or an optical plate that converts an incident beam into aline-shaped beam having a three-dimensional effect.

The base substrate 10 transmits the incident beam. The base substrate 10enables the incident beam to be moved from one side to another side byinternal reflection. The base substrate 10 may be provided in a plate orfilm form using glass, resin and the like. The base substrate 10 has afirst surface and a second surface opposite to the first surface.

The three-dimensional effect forming part 20 has a pattern 22 formed byvarious concave parts and convex parts. The pattern 22 is configuredsuch that pattern units having a semicircular shape are distributed in aradial form from the same center.

In the present embodiment, the three-dimensional effect forming part 20is composed of a separate pattern layer 20 a having one surface on whichthe pattern 22 is provided. The pattern layer 20 a may be made of athermoplastic resin, a thermosetting resin or a photocurable resin, andmay be bonded to the second surface of the base substrate 10 by acondensing force or by an adhesive member.

Also, the stereoscopic display device 100 according to the presentembodiment may further include a light source 30. The light source 30irradiates an incident beam from a first side (hereinafter referred toas ‘an incident surface’) of the base substrate 10 to the inside of thebased substrate 10. In the present embodiment, an incident surface 101refers to a side that is concavely formed in a semicircular shape fromone side of the base substrate.

A separation space 103 may be provided between the light source 30 andthe incident surface 101. The separation space 103 may be installed tohave only a minimum separation distance in consideration of rotation ofthe light source 30.

The light source 30 may be an LED package including at least one LEDelement. When the LED element is used, incident beams having variouscolors and a high straight property may be easily provided so that aline-shaped beam can be more effectively implemented.

In the present embodiment, the light source 30 is mounted to a printedcircuit board providing a signal or driving power for controlling anoperation of the LED element. In the present embodiment and mostembodiments, for convenience of the description, it is assumed that thelight source 30 includes the printed circuit board, and the printedcircuit board is not separately illustrated.

Also, the stereoscopic display device 100 according to the presentembodiment may further include a driving part (see reference numeral 170of FIG. 8) intended for changing a light radiation direction of thelight source 30 or rotating the light source 30. The driving part may beimplemented by a motor and the like. When the driving part is used,line-shaped beams having different irradiation angles may besequentially displayed on the pattern 22 having the semicircular orsemielliptical shape via the single light source 30.

FIG. 3 is a cross-sectional view taken along line III-Ill of thestereoscopic display device of FIG. 2.

Referring to FIG. 3, when light irradiated from the light source 30enters into the inside of the base substrate 10 via the incident surface101, the incident beam is reflected from the inside of a laminate of thebase substrate 10 and the pattern layer 20 a and travels from a centralportion of the patterns 22 arranged in a semicircular shape to an edge.

When the incident beam meets the patterns having an inclined surface221, the pattern 22 guides the incident beam in a first surfacedirection toward which the first surface looks or a second surfacedirection toward which the second surface looks using refraction orreflection from the inclined surface 221, thereby implementing aline-shaped beam having a three-dimensional effect in a first pathresulting from a pattern arrangement direction R. The first path is aspecial optical path of the incident beam.

According to the present embodiment, the stereoscopic display device,which can implement the incident beam of the LED light source as aline-shaped beam having a three-dimensional effect via a pattern designof the three-dimensional effect forming part, may be implemented. Thisstereoscopic display device may be usefully applied to a dashboard for avehicle whose interior design is considered very meaningful. In the caseof the dashboard, a line-shaped beam having a three-dimensional effectresults from three-dimensionally implementing an indicator having aneedle-like shape in the dashboard.

A line-shaped beam with a three-dimensional effect will be described ingreater detail with reference to FIGS. 4 and 5.

FIG. 4 is a partially enlarged plan view illustrated for explaining anoperational principle of the stereoscopic display device of FIG. 1.

Referring to FIG. 4, according to the stereoscopic display deviceaccording to the present embodiment, the three-dimensional effectforming part 20 includes the pattern in which multiple pattern unitshaving a semicircular or semielliptical shape are radially arranged fromthe same center. In such a pattern structure, the incident beam BL0 fromthe light source 30 is incident to the base substrate and passes throughthe pattern via an optical path that crosses at right angles to theincident surface 101.

At this time, the incident beam BL0 travels to a first path that crossesat right angles to respective pattern extension directions of thepatterns units in which convex parts M extend in a ridge ormountain-like shape, or concave part V extend in a ditch or valley-likeshape. This is because movement of the light is concentrated on anoptical path of the pattern that can be traversed in the least timeaccording to the Fermat's principle that ‘a ray of light passing along amedium travels along a movement path that can be traversed in the leasttime.’

Also, when the incident beam meets the pattern, the pattern 22 guidesthe incident beam in the first surface direction or the second surfacedirection using reflection and refraction from the inclined surfaces ofthe pattern units, thereby emitting the incident beam to the outside ofthe stereoscopic display device. According to this emission beam, theuser may see the line-shaped beam at the outside of the stereoscopicdisplay device.

FIG. 5 is a partially enlarged cross-sectional view illustrated forexplaining an operational principle of the stereoscopic display deviceof FIG. 1

Referring to FIG. 5, the incident beam BL0 moving in the inside of thebase substrate 10 as the beam supplied from the light source 30 isreflected from the inside of the laminate of the base substrate and thepattern layer 21 a at a critical angle or below determined by arefractive index of the base substrate 10 and a refractive index of anexternal medium (atmosphere) and travels from one side to another side.

When the incident beam BL0 meets the inclined surface 221 of the pattern22, the incident beam BL0 is refracted or reflected from the inclinedsurface 221 and thus has an internal incidence angle which is largerthan the critical angle. Then, the incident beam is emitted from thefirst surface direction (z direction) or the second surface direction(−z direction) to the outside of the laminate.

The patterns units of the pattern 22 function as indirect light sourcesemitting the incident beam in the first surface direction or the secondsurface direction by refracting or reflecting the incident beam usingthe inclined surface 221. Here, as viewed from a predetermined standardpoint of the outside of the stereoscopic display device, it seems thatthe indirect light sources formed by the respective patterns unit of thepattern 22 are located far away from the standard point gradually alonga first path on the pattern.

In other words, the pattern units are sequentially arranged in a patternarrangement direction (x-direction) based on the light source 30.Furthermore, when a first pattern unit P11 of a first area a1, a secondpattern unit P12 of a second area a2, and a third pattern unit P13 of athird area a3 are arranged in order from a position near to the lightsource in the pattern arrangement direction, a second optical path ofthe incident beam from the light source 30 to the second pattern unit 12is longer than a first optical path of the incident beam from the lightsource 30 to the first pattern unit P11 and is shorter than a thirdoptical path of the incident beam from the light source 30 to the thirdpattern unit P13. That is, a second distance L2 between a secondindirect light source LS2 and the second pattern unit P12 is longer thana first distance L1 between a first indirect light source LS1 and thefirst pattern unit P11 and is shorter than a third distance L3 between athird indirect light source LS3 and the third pattern unit P13. Thismeans that the line-shaped beam has a perceptional depth effect(three-dimensional effect) inwardly concavely generated in the thicknessdirection of the base substrate by the indirect light sources locatedfar away gradually from the standard point along the first path whenviewed the standard point of the outside of the stereoscopic displaydevice.

As described above, the multiple pattern units of the pattern 22 may besequentially arranged along the first path of the line-shaped beam asviewed from a predetermined external standard point and may serve asindirect light sources located far away gradually from the standardpoint, thereby enabling the pattern 22 to implement a line-shaped beamhaving a three-dimensional effect in the first path.

The line-shaped beam having the three-dimensional effect refers to anoptical image having a perceptional depth in which the line-shaped beamintroduced to be limited to a specific optical width from thepredetermined first path by a pattern design as viewed from the firstsurface direction or the second surface direction gradually enters fromthe first surface or the second surface of the base substrate 10 intothe inside of the base substrate 10. The line-shaped beam having thethree-dimensional effect may have a form in which luminous is graduallyreduced along the first path.

Meanwhile, with regard to the first to third pattern units P11, P12 andP13, the second pattern unit P12 may be a pattern unit located rightafter the first pattern unit P11 on the second surface of the basesubstrate 10 as viewed from the light source 30 or may be a pattern unitlocated between the first pattern unit P11 and the other pattern unitsin a predetermined number. Similarly, the third pattern unit P13 may bea pattern unit located right after the second pattern unit P12 as viewedfrom the light source 30, or a pattern unit located between the secondpattern unit P12 and the other pattern units in a predetermined number.

FIG. 6 is a plan view illustrated for explaining an operationalprinciple of the stereoscopic display device of FIG. 1.

Referring to FIG. 6, when the dashboard is implemented using thestereoscopic display device according to the present embodiment, theincident beam from the light source 30 is converted into a line-shapedbeam having a three-dimensional effect and is displayed on the pattern22.

When the light source 30 is designed to be rotatable, namely, apredetermined driving part (reference numeral 170 of FIG. 8) is coupledto the lights source 30, the light source 30 is rotated by the drivingpart, a rotating line-shaped beam with a three-dimensional effect BL1may be implemented on the pattern of the semicircular or semiellipticalshape.

When the driving part is installed to rotate at a predetermined rotationangle according to a predetermined input signal or a control signal, thedashboard may be implemented a dashboard for various devices or adashboard for a vehicle.

When the dashboard is implemented as a dashboard for a vehicle, thedriving part may be a motor or an actuator that is connected to any oneof various vehicle controllers mounted in a vehicle and is drivenaccording to a control signal of the vehicle controller. The drivingpart may be operated by power of a vehicle battery.

Also, with regard to the dashboard, the light source 30 may be installedto be separable from the stereoscopic display device (in this case, thestereoscopic display device corresponds to an optical plate) includingthe laminate of the base substrate 10 and the three-dimensional effectforming part or the light guide part having the pattern 20, and may bedisposed to irradiate light to the incident surface 101 having thesemicircular shape or the semielliptical shape while performing arotation motion. Like the driving part, the light source 30 may beconnected to the vehicle controller or the vehicle battery.

FIG. 7 is a plan view illustrated for explaining a modified example ofthe stereoscopic display device of FIG. 1.

Referring to FIG. 7, the stereoscopic display device according to thepresent embodiment may be used in a dashboard. The stereoscopic displaydevice may have a non-pattern forming part 24 in which some patternunits of the pattern 22 are not formed in a pattern arrangementdirection.

The non-pattern forming part 24 enables a line-shaped beam to have amodified optical image by implementing a portion in which theline-shaped beam having a three-dimensional effect is disconnected. Thenon-pattern forming part 24 corresponds to a portion in which thepattern units having a convex or concave form are not provided on onesurface of the patter layer bonded to the first surface of the basesubstrate 10 or on one surface of the light guide part corresponding toa single body thereof. The non-pattern forming part 24 may be parallelto the one surface described above or the first surface of the basesubstrate 10.

Meanwhile, a sign layer (not drawn) of a figure, a sign or the like maybe provide on the second surface of the base substrate 10. The signlayer may overlap with the pattern 22 having the semicircular orsemielliptical shape or may be provided to be located at the outer sideof an edge of the pattern 22 by performing printing with an ink having acolor.

According to the present embodiment, when the incident beam incidentthrough the incident surface 101 from the light source 30 is convertedinto a line-shaped beam having a three-dimensional effect on the pattern22, the line-shaped beam having a three-dimensional effect in a dottedline form may be implemented. Also, according to a rotation angle of thelight source 30 connected to the driving part, the rotating line-shapedbeam having a three-dimensional effect in a dotted line form BL1 may beimplemented on the semicircular or semielliptical pattern 22.

FIG. 8 is a cross-sectional view showing a stereoscopic display deviceaccording to another embodiment of the present disclosure.

Referring to FIG. 8, the stereoscopic display device according to theembodiment includes: the base substrate 10; the pattern layer 20 aforming the three-dimensional effect forming part by the patterns; thelight source 30 and a reflective layer 40. Also, the stereoscopicdisplay device may include a reflective pattern 120, an adhesive pattern130 and a separation area 140 between the pattern layer 20 a and thereflective layer 40. Also, the stereoscopic display device may include:a printed circuit board 150 to which the light source 30 is mounted; asupport part 160 such as a frame for supporting the printed circuitboard 150; a driving part 170 connected to a light source to rotate thelight source; and a power supply part supplying power to the lightsource 30 via the printed circuit board.

The reflective layer 40 is disposed between the printed circuit board150 and the pattern layer 20 a. The reflective layer 40 is made of amaterial having high reflection efficiency and reflects light emitted bypassing through the pattern layer 20 a to return the light from thepattern layer 20 a again. When the reflective layer 40 is used, opticalloss of the stereoscopic display device can be reduced, and aline-shaped beam having a three-dimensional effect may be more clearlyexpressed.

A synthetic resin in which a white pigment is diffused and contained maybe used as a material of the reflective layer 40. Titanium oxide,aluminum oxide, zinc oxide, lead carbonate, barium sulfate, calciumcarbonate and the like may be used as the white pigment. Polyethyleneterephthalate, polyethylene naphthenate, acryl resin, poly carbonate,polystyrene, polyolefin, cellulose acetate, weather resistant vinylchloride and the like may be used as a raw material of the syntheticresin, but the present disclosure is not limited thereto. Also,according to some embodiments, the reflective layer 40 may be made ofAg, Al, stainless steel (304SS) and the like.

In order to control reflection efficiency and a reflection area of thereflective layer 40, the reflective pattern 120 may be provided on thereflective layer 40. The reflective pattern 120 may be implemented by apattern printed on one surface of the reflective layer 40 with an inkmaterial. The reflective pattern 120 may have a form in which patternunits having a hexagonal shape are arranged in a hive-like shape.

A material of the reflective layer 40 may be used as a material of thereflective pattern 120, but the material is not limited to thereto.TiO₂, CaCO₃, BaSO₄, Al₂O₃, Silicon, PS (Poly Styrene) and the like maybe used as the material of the reflective pattern 120.

In the present embodiment, the pattern layer 20 a is arranged so thatthe pattern of the three-dimensional effect forming part can face thereflective layer 40. The arrangement is intended to prevent the patterncovered by the resin layer from the loss of its own special function(reflection or refraction function) caused by the resin layer when thebase substrate 10 is formed by applying the resin layer to the patternlayer 20 a. That is, the pattern should function to guide the incidentbeam to the outside of the device by refracting and reflecting theincident beam from the inclined surface. When the pattern is covered bya resin layer having a similar refractive index to that of the patternlayer 20 a, the inclined surface of the pattern substantiallydisappears, so the pattern cannot perform its function. However, in thepresent embodiment, the pattern layer 20 a is disposed to face thereflective layer 40 rather than facing the first surface of the basesubstrate 10 so that the problem of the pattern can be prevented frombeing generated.

When the pattern layer 20 a and the reflective layer 40 are disposed tobe laminated, the adhesive pattern 130 may be used. In such a case, theadhesive pattern 130 may have a predetermined pattern (a hive-like shapeand the like) and may be used so as to limit reflectivity or areflection area of the reflective layer 40. The adhesive pattern 130 maybe integrally implemented by the reflective pattern 120 containing anadhesive material according to some embodiments.

Also, when the pattern layer 20 a and the reflective layer 40 aredisposed to be laminated, the separation area 140 may be formed betweenthe pattern layer 20 a and the reflective layer 40 by the pattern of thepattern layer 20 a or the adhesive pattern 130 between the pattern andthe adjacent pattern. The separation area may not be formed by entirelydisposing the adhesive pattern 130 on the pattern arrangement surface ofthe pattern layer 20 a. On the contrary, when the separation area 140 isformed, the separation area 140 may function to guide minute scatteringof the line-shape beam having the three-dimensional effect orsurrounding beams thereof so that the line-shape beam having thethree-dimensional effect can express optical images having differentfeelings. The separation area 140 may be an air layer or a vacuum layer.

The printed circuit board 150 is connected to the light source 30 tosupply power or a driving signal to the light source 30. The printedcircuit board 150 may include a rigid or flexible type printed circuitboard. The light source 30 mounted to the printed circuit board 150 maybe disposed on the incident surface 101 of the base substrate 10 via anopening 41 of the reflective layer 40 and an opening of the patternlayer 20 a.

The support part 160 may be provided so as to support the base substrate10, the reflective layer 40, the driving part 170 and the like as wellas the printed circuit board 150. The support part 160 may be made of ametallic material such as stainless steel and the like.

The driving part 170 may be connected to the light source 30 to rotatethe light source, or may be disposed in front of a light emittingsurface of the light source 30 so that a radiation direction of theemission beam of the light source 30 can be freely changed in asemicircle or a semi-ellipse. When the driving part rotates the lightsource, the driving 170 may be implemented so as to rotate a printedcircuit board (a first printed circuit board part) to which the lightsource 30 is mounted. In such a case, the first printed circuit boardpart may be connected to the remaining printed circuit board (a secondprinted circuit board part) via a separate wiring (not drawn) or asliding wiring structure so as to perform a reciprocating rotationmotion in the semicircle or the semi-ellipse or to enable thetransmission of power of a signal

The power supply part 180 is connected to the light source 30 or thedriving part 170 to supply power. The power supply part 180 may includecommonly used power connected via a wiring, a connector and the like.However, according to some embodiments, the power supply part may beprovided as a vehicle battery. When the power supply part is provided asthe vehicle battery, the light source 30 or the driving part 170 isconnected to the vehicle battery and is driven by the power of thevehicle battery.

According to the present embodiment, when a line-shaped beam having athree-dimensional effect is implemented by a pattern design, thestereoscopic display device capable of providing a change to an opticalimage using the reflective pattern 120, the adhesive pattern or theseparation area 140 may be provided. This stereoscopic display devicemay be effectively applied to an application such as various displaydevices or lighting devices for a vehicle dashboard and the like.

FIG. 9 is a cross-sectional view showing a stereoscopic display deviceaccording to a further embodiment of the present disclosure.

Referring to FIG. 9, the stereoscopic display device according to thepresent embodiment includes: a light guide part 10 a; the pattern 22provided on a first surface of the light guide part 10 a; and the lightsource 30 disposed at a central portion of the pattern 22 having asemicircular or semielliptical shape to irradiate an incident beam to anedge. The pattern 22 constitutes the three-dimensional effect formingpart 20.

The light guide part 10 a implements, as a single member, the laminateof the base substrate and the pattern layer of the stereoscopic displaydevice of FIG. 8. In the present embodiment, the light guide part 10 aperforms substantially the same function as that of the laminate of thebase substrate and the pattern layer. Glass, resin and the like may beused as the material of the light guide part 10 a, but the material isnot limited thereto. However, the light guide part is made of a resinhaving a predetermined thickness, the light guide part 10 a may haveflexibility to the extent that the light guide part can be wound arounda roll having a predetermined curvature.

According to the present embodiment, when the light guide part 10 a isformed as a resin layer, the printed circuit board is provided as aflexible printed circuit board, a flexible stereoscopic display device,which is bendable with a predetermined curvature, may be implemented.

Meanwhile, by forming the base substrate and the pattern layer insteadof the light guide part as the resin layer, the flexible stereoscopicdisplay device may be also implemented. The laminate of the basesubstrate and the pattern layer, or the light guide part may have athickness (about 250 μm or less) suitable for implementation of theflexible stereoscopic display device, and the base substrate and thepattern layer may be made of the same material or different materials.

FIG. 10 is a cross-sectional view showing a stereoscopic display deviceaccording to yet another embodiment of the present disclosure.

Referring to FIG. 10, the stereoscopic display device according to thepresent embodiment includes: the base substrate 10; the pattern layer 20a; the light source 30; the reflective layer 40; and a separation layer50.

The stereoscopic display device according to the present embodiment maybe substantially identical to the stereoscopic display device of theembodiment previously described with reference to FIG. 8 except for thearrangement direction of the pattern layer 20 a and the separation layer50.

In the present embodiment, the pattern layer 20 a is disposed so thatthe pattern 22 of the three-dimensional effect forming part 20 can beburied by the resin layer that forms the base substrate 10. In such acase, when a refractive index between the pattern layer 20 a and theresin layer is small, a reflection or refraction function of the pattern22 may be nearly lost. In order to prevent this problem, in the presentembodiment, the separation layer 50 is disposed between the pattern 22of the pattern layer 20 a and the base substrate 10.

In other words, when a difference between a refractive index of the basesubstrate 10 and a refractive index of the pattern layer 20 a is 0.2 orless, the inclined surface of the pattern 22 located between the basesubstrate and the pattern layer fails to properly perform the refractiveor reflex action of an incident beam. In such a case, it is difficult toimplement a line-shaped beam having a three-dimensional effect becausethe pattern 22 of the three-dimensional effect forming part 20 cannotguide the incident beam of the light source 30 to the outside of thedevice. Accordingly, in the stereoscopic display device according to thepresent embodiment, the separation layer 50 is formed between thepattern 22 and the base substrate, and thus the base substrate 10 formedwith the resin layer and the pattern 22 are clearly separated so thatthe reflective and refractive motions of the incident beam from theinclined surface of the pattern 22 can be smoothly performed.

The separation layer 50 may be a metallic coating layer disposed betweenthe base substrate 10 and the pattern layer 20 a so that a difference ina refractive index between the base substrate and the pattern layer canbe prevented from being less than a predetermined value

According to the present embodiment, the pattern 22 of thethree-dimensional effect forming part 20 may be disposed at the basesubstrate composed of the resin layer or at the inside of the lightguide part.

FIGS. 11 to 13 are exemplary views for a pattern of a three-dimensionalforming part that can be applied to the stereoscopic display device ofFIG. 1.

Referring to FIG. 11, the pattern 22 of the three-dimensional effectforming part 20 according to the present embodiment has a patternstructure in a prism or triangular cross section form. When the pattern22 has the prism form, the inclined surface 221 of the pattern 22 has apredetermined inclination angle with respect to a pattern arrangementsurface extending to an x-direction. That is, the inclined surface 221may be designed to be inclined at a predetermined inclination angle θwith respect to a direction (z-direction) that crosses at right anglesto the pattern layer or the first surface 12 of the light guide part. Inthe laminate of a pattern layer with the light guide part with regard tothe first surface 12 or the base substrate, the pattern layer is brieflyreferred to as the light guide part.

The inclination angle θ of the inclined surface 221 may be about 5° to85°. The inclination angle θ may be limited in consideration of arefractive index of the light guide part. However, in consideration of aminimum or maximum angle capable of enabling reflection and refractionfrom the inclined surface to be property performed, the inclinationangle θ may basically range from 5° to 85°.

As one example, when the refractive index of the light guide part rangesfrom about 1.30 to 1.80, an inclination angle of the inclined surface221 may be larger than 33.7° and smaller than 50.3°, or may be largerthan 49.7° and smaller than 56.3° according to a standard direction(z-direction or y-direction).

Also, according some embodiments, the light guide part may be made of amaterial having a high refractive index. For example, in the case ofmanufacturing high intensity LEDs, when a ray of light having a specificincidence angle penetrates a capsule material by passing along a die,total internal reflection is generated due to a difference in an n value(a refractive index) between the die (n=2.50˜3.50) and a generalpolymeric capsule material (n=1.40˜1.60), and accordingly, lightextraction efficiency of the device is reduced. Thus, in order toproperly solve this problem, a high refractive index polymer(n=1.80˜2.50) is used. In the present embodiment, the light guideportion or the main patterns 22 may be provided by utilizing the highrefractive index polymer (n=1.80˜2.50) used in manufacturing highintensity LEDs. In this case, the inclination angle of the inclinedsurface 221 of the pattern 22 may be larger than 23.6° and smaller thanabout 56.3° according to a refractive index of the light guide part.

The inclination angle according to the refractive index may berepresented by following Equation 1 according to the Snell's law.

$\begin{matrix}{\frac{\sin\;\theta_{1}}{\sin\;\theta_{2}} = \frac{n\; 2}{n\; 1}} & \left\lbrack {{Equation}\mspace{14mu} 1} \right\rbrack\end{matrix}$

In Equation 1, sin θ1 is an incidence angle or a refraction angle oflight shown in a first medium having a first refractive index n1, andsin θ2 is a refraction angle or an incidence angle of light shown in asecond medium having a second refractive index n2.

As previously described, with regard to the light guide part of thestereoscopic display device according to the present embodiment, theinclined surface of the pattern of the three-dimensional effect formingpart may be provided to have an inclination angle θ ranging from about5° to about 85° as an inclination angle which enables an incident beamto be reflected or refracted appropriately.

Also, according to the present embodiment, a ratio of the width w to theheight h between the adjacent pattern units of the pattern 22 may belimited to a predetermined ratio. The width w may be a predetermineddistance between two adjacent pattern units, namely, a pitch. Forexample, when the pattern is designed so as to emphasize a perceptionaldepth effect of a line-shaped beam, the width w may be provided to beequal to or smaller than the height h. Also, when the pattern isdesigned so that relatively long images can be expressed by theline-shaped beam, the width w of the pattern may be provided to belarger than the height h.

When the ratio h/w of a width to a height of the pattern 22 is smallerthan 1, the concave part has a lower depth compared to a case in whichthe ratio h/w of the width to the height of the pattern 22 is 1 or more,so that the pattern can be easily manufactured.

A width w of the pattern 22 may be about 10 to 500 μm This width w maybe an average distance between two adjacent pattern units in thex-direction and may be adjusted according to a pattern design, anarrangement structure or a desired optical image shape.

According to the present embodiment, by using a width w and a height hof the pattern 22 as a factor for adjusting properties, the pattern 22is designed so that various optical images resulting from theline-shaped beam having the three-dimensional effect targeted to beimplemented can be efficiently and easily controlled.

Referring to FIG. 12, with regard to the optical member according to thepresent embodiment, the pattern 22 of the three-dimensional effectforming part 20 has a pattern structure in a polygonal cross sectionform. That is, the inclined surface 221 of the pattern 22 has abroken-line graph form.

The inclined surface 221 of the pattern 22 may have multiple inclinationangles θ1, θ2 according to the number of segments of a broken-line graphin a direction (z-direction) crossing at right angles to a thicknessdirection of the light guide part or the first surface 12 of the lightguide part. The second inclination angle θ2 may be larger than the firstinclination angle θ1. The first or second inclination angles θ1, θ2 maybe designed within the range which is larger than about 5° and smallerthan about 85°.

The three-dimensional effect forming part 20 of the present embodimentmay include the separation part 222 provided between two adjacentpattern units. For example, when the pattern 22 includes: a firstpattern unit Cm−1; a second pattern unit Cm; and a third pattern unitCm+1 (where, m is an natural number of 2 or more), the three-dimensionaleffect forming part 20 may include the separation part 222 providedbetween the first pattern unit Cm−1 and the second pattern unit Cm, andbetween the second pattern unit Cm and the third pattern unit Cm+1.

A width w1 of the separation part 222 is smaller than a width w of thepattern 22. In order for the three-dimensional effect forming part 20 toimplement a natural line-shaped beam, the separation part 22 may bedesigned to have the width w1 of several μm or less or the width ofabout ⅕ or less of the width w of the pattern.

Also, the three-dimensional effect forming portion 20 of the presentembodiment may have an interrupted surface 223, which is almost parallelto the first surface 12, on the patterns 22. The interrupted surface 223is a part which does not function to enable light to be substantiallyemitted to the outside through the reflection or refraction of theincident beam. Thus, since the line-shaped beam implemented by thepattern 22 may have an interrupted part corresponding to the interruptedsurface 223, a width w2 of the interrupted surface 223 may beappropriately designed in a range of several μm or less in order toimplement a line-shaped beam having a desired shape.

Referring to FIG. 13, according to the stereoscopic display device ofthe present embodiment, the pattern of the three-dimensional effectforming part 20 has a lenticular form, a semi-circular cross sectionform or a semielliptical cross section form. The pattern 22 has theinclined surface inclined at a predetermined angle in a thicknessdirection (z-direction) of the light guide part or a direction(z-direction) which crosses at right angles to the first surface 12 ofthe light guide part. The pattern 22 may have a symmetrical form basedon a pattern center line (not drawn) in the z-direction.

Due to the semi-circular structure, the inclined surface of the pattern22 may have a structure in which a position on the inclined surfacemeeting the incident beam BL is changed according to an incidentposition of the incident beam BL0. That is, since the inclined surface221 of the pattern 22 of the present embodiment is a surface in contactwith an arbitrary point in a circular arc form, a tangent line incontact with the arbitrary point on the pattern 22 may be placed at afixed inclination angle θ in the direction (the z-direction) crossing atright angles to the first surface 12 of the light guide part. Theinclination angle θ may be larger than 0° and smaller than 90° accordingto each position of the inclined surface which the beam BL strikes.

In the present embodiment, the pattern 22 of the three-dimensionaleffect forming part 20 may further include the separation part 222provided between two adjacent patterns. The separation part 222 may be anon-pattern forming part between two adjacent pattern units that areinwardly concavely formed from the first surface 12 of the pattern layeror the light guide part and may extend parallel to the first surface 12as a part of the first surface 12. The formation of the separation part222 corresponding to a gap between the pattern units provided forconvenience of a pattern design or a production process may be omittedaccording to a material of the light guide part, the production processor the pattern design.

Meanwhile, when the separation portion 222 is disposed, a width w1 ofthe separation part 222 is designed to be smaller than a width w of thepattern units of the pattern 22. The width w1 of the separation part 222is may be about ⅕ or less or several μm or less of the width w of thepattern 22. When the width w1 of the separation part 222 is greater thanthe width w of the pattern 22, the pattern 22 may implement theline-shaped beam having an interrupted part.

In particular, when the pattern 22 has a lenticular form, the patternmay be designed such that a rate (h/w) of a width (or a diameter) to aheight of the pattern 22 is about ½ or less, or an inclination angle θof the inclined surface is about 60° or less, thereby easilyimplementing a line-shaped beam.

Meanwhile, in the aforesaid embodiments, based on a case in which thecross section of each pattern has a triangular shape, a polygonal shapeor a semicircular shape, the description has been performed, but thepresent disclosure is not limited to this configuration. If the patternhas a structure in which light traveling to the inside of the lightguide part is refracted or reflected and is emitted in the first surfacedirection or the second surface direction, in addition to the crosssection having a straight lined shape, a curve shape, and a broken-linegraph-like shape, the cross section of the pattern may have acombination of these shapes or the other shapes.

FIG. 14 is a partially enlarged plan view showing a stereoscopic displaydevice according to still another embodiment of the present disclosure.

Referring to FIG. 14, the stereoscopic display device according to thepresent embodiment includes the light guide part having the firstsurface on which the pattern 22 is provided, and a plurality of lightsources 31, 32, 33, 34.

The pattern 22 includes semicircular pattern units radially diffusedfrom the same center and arranged in a wave-like shape. The patternunits have a form in which convex parts M or concave parts V extend in asemicircular arc.

The light source has a first light source 31, a second light source 32,a third light source 33 and a fourth light source 34 arranged at acentral portion of the pattern 22. The first to fourth light sources arearranged to irradiate light from the central portion of the pattern 22in different radial directions. The first to fourth light sourcescorrespond to sub-light sources of the light source.

The first to fourth light sources may be connected to a controller via apredetermined wiring and a connector. In this case, the first to fourthlight sources may be selectively turned on in response to a controlsignal of the controller. In this structure, the driving part (seereference numeral 170 of FIG. 8) for rotating the light source orchanging an optical path of the light source may be omitted.

When the first to forth light sources 31 to 34 are selectivelycontrolled by a control part, the stereoscopic display device may beeasily applied to an application such as a dashboard. The dashboard maybe a dashboard for a vehicle. In such a case, the control part is apartial function part of vehicle controllers or a partial constitutionpart that performs a function corresponding to the function part.

According to the present embodiment, a line-shaped beam having athree-dimensional effect serving as an indicator having a needle-likeshape may be implemented on the radial pattern using the plurality ofsub-light sources.

FIG. 15 is a partially enlarged plan view showing a stereoscopic displaydevice according to still another embodiment of the present disclosure.FIG. 16 is a partially plan view illustrated for explaining anoperational principle of the stereoscopic display device of FIG. 15

Referring to FIG. 15, the stereoscopic display device according to thepresent embodiment includes: the base substrate 10; thethree-dimensional effect forming part 20 provided on the first surfaceof the base substrate 10; the light source 30; and the driving part 170.

The base substrate 10 has a first surface and a second surface oppositeto the first surface and has a side with a predetermined thicknessbetween the first and second surfaces, having a needle or long rod-likeshape. The base substrate 10 has a light transmitting property fortransmitting an incident beam. The base substrate 10 may perform areciprocating motion with a needle of the dashboard in the printing part60 having a dashboard-like shape arranged at a lower portion.

The three-dimensional effect forming part 20 has the pattern 22. Thepattern 22 has a plurality of pattern units arranged in a firstdirection, and the pattern units have respective inclined surfaceshaving an inclination angle with respect to the first surface.

When the incident beam is incident to the central part of the patternand travels to the inside of the base substrate 10, the pattern 22guides the incident beam to the first surface direction or the secondsurface direction by refraction or reflection from the inclined surfaceof the pattern, thereby displaying a line-shaped beam having athree-dimensional effect in the first path resulting from a patternarrangement direction.

The light source 30 is disposed at one end of the pattern 22 on the basesubstrate 10. The light source 30 is supported by the base substrate 10.

The driving part 170 is coupled to the base substrate 10 and rotates thebase substrate 10 in a semicircular or a semielliptical shape based onone end of the base substrate on which the light source 30 is arranged.The driving part 170 is coupled to the vehicle controller 190 so thatthe base member 10 can be rotated at a predetermined rotating angleresulting from a vehicle speed.

As illustrated in FIG. 16, the stereoscopic display device according tothe present embodiment may display a line-shaped beam having athree-dimensional effect while performing a rotationally reciprocatingmotion with the indicator having a needle-like shape.

FIG. 17 is a plan view showing a stereoscopic display device accordingto still another embodiment of the present disclosure.

Referring to FIG. 17, the stereoscopic display device according to thepresent embodiment includes the base substrate, the three-dimensionaleffect forming part, the light source and a control part 190.

The base substrate includes a first base substrate, a second basesubstrate and a third base substrate having a rod or needle-like shape.

The three-dimensional effect forming part includes: a firstthree-dimensional effect forming part having a first pattern arranged ona first surface of the first base substrate; a three-dimensional effectforming part having a second pattern arranged on a first surface of thesecond base substrate; and a third three-dimensional effect forming parthaving a third pattern arranged on a first surface of the third basesubstrate.

The light source includes: a first light source disposed at one end ofthe first pattern and irradiating a first incident beam from one end toanother end; a second light source disposed at one end of the secondpattern and irradiating a second incident beam from the one end to theother end; and a third light source disposed at one end of the thirdpattern and irradiating a third incident beam from the one end to theother end.

The first base substrate, the second base substrate and the third basesubstrate are disposed in a radial form such that the first lightsource, the second light source and the third light source are disposedat a central portion of a printing part 40 having a semicircular orsemielliptical shape, and the incident beam is irradiated from thecentral portion C in different radial directions.

The control part 190 is connected to the first light source, the secondlight source and the third light source so as to selectively control aturn-on motion of these light sources. The control part 190 may be anyone of various vehicle controllers mounted to the vehicle. Thestereoscopic display device is connected to a vehicle battery and isoperated by power of the vehicle battery.

According to the present embodiment, the stereoscopic display devices ina multiple needle form are arranged in a dashboard-like shape and areselectively controlled so that the stereoscopic display device arrangedat a specific position can be operated according to an input controlsignal corresponding to a vehicle speed, thereby enabling implementationof a vehicle dashboard.

The stereoscopic display device of the aforesaid embodiments may be usedin various dashboards in addition to the dashboard for the vehicle.Also, the stereoscopic display device may be utilized in a thermometer,a clock, a direction guiding display panel and the like.

FIG. 18 is a plan view showing a stereoscopic display device(hereinafter briefly referred to as ‘display device’ according to stillanother embodiment of the present disclosure (hereinafter brieflyreferred to as ‘display device’).

Referring to FIGS. 1 and 18, a display device 100 according to thepresent embodiment has the base member 10, the radial pattern and thereflective layer 40. Also, the display device according to the presentembodiment may further include the light source 30.

The base member 10 enables the beam incident from one side to spread outas flat light by guiding the beam in the interior. The base member 10may be an optical film having a light guide function.

On side 101 of the base member is arranged so that the beam B of thelight source 30 is incident at appropriately a right angle. The one side101 of the base member may have a semicircular shape that surrounds thelight source 30.

A thickness of the base member 10 may be appropriately selected in therange of hundreds of μm to several mm according to application of thedisplay device. The base member 10 may be made of acryl resin in termsof high transparency, high hardness, and a low cost. Also, the basemember 10 may be composed using an optical resin such as polycarbonate(PC), polymethylmethacrylate (PMMA), polystyrene (PS), ARTON, ZEONOR andthe like.

The radial pattern 22 is provided on one surface of the base member 10.The radial pattern 22 refers to a pattern form in which pattern unitsare diffused in a radial form based on a predetermined radial centerportion. That is, the radial pattern 22 may refer to a simple pattern asa constitutive element for implementing a line-shaped beam or aline-shaped beam having a three-dimensional effect. A pattern shape ofthe radial pattern 22 may be a prism shape or a lenticular shape. Whenthe radial pattern 22 is used, a background or an image having athree-dimensional effect may be easily implemented.

The radial pattern 22 may be formed on one surface of the base member 10by mechanically processing one surface of the base member 10 in apredetermined pattern. When the radial pattern 22 is formed by amechanical processing method using a tool such as a bite and the like, asurface of the radial pattern 22 may be treated as a mirror-likefinishing surface via a separate process forming the mirror-likefinishing surface. The radial pattern 22 may have an arithmetic meanroughness Ra of about 0.02 or less, and a maximum height roughness Rmaxof about 0.15 to 0.30 or less. This value results from considering asurface roughness similar to an average surface roughness of aluminum.

The reflective layer 40 is arranged on one surface of the base member 10and reflects light passing through the radial pattern 22 to the radialpattern 22 again. When this reflective layer 40 is used, lightefficiency and luminous of the display device may be increased, athree-dimensional effect by the radial pattern 22 may be more clearlyshown in the display device.

The reflective layer 40 may contain Al, Ag, a white material or acombination thereof. For example, the reflective layer 40 may beimplemented by coating one surface of the base member with a reflectionmaterial or using a film substrate impregnated with a reflectionmaterial.

The light source 30 is arranged in the radial center portion of theradial pattern 22 and emits light to one side 101 of the base member 10.An LED (Light Emitting Diode) may be used as the light source 30. Forexample, the light source 30 may be implemented using a side-type lightemitting chip LED or a top emission type chip LED. In the case of thetop emission type chip LED, the light sources 30 is disposed in a formin which an upper surface of the LED is bent at about 90° to face oneside of the base member 10.

Also, when the light source 30 is arranged in the radial center portionof the radial pattern 22, the separation space 103 may be providedbetween the light source 30 and one side 101 of the base member 10. Theseparation space 103 may be implemented as an empty space filled withair and the like according to some embodiments.

When the separation space is arranged between the light source 30 andthe one side of the base member 10, the light emitted from the lightsource 30 passes through an air layer of the separation space 103 andpenetrates a medium having a different refractive index so that adiffusion property or a scattering property of the light can beimproved. Then, the light penetrates the medium having the differentrefractive index again via the base member so that uniformity of thediffused and scattered light can be improved.

In the present embodiment, when the display device 100 is used as thebackground of a dashboard for a vehicle, the light source 30 may beconnected to the driving part (see reference numeral 220 of FIG. 31)that rotates an indicator (see reference numeral 210 of FIG. 31) havinga needle-like shape of the dashboard for the vehicle at a predeterminedangle according to the speed of an object. For example, the light source30 may be connected to the driving part for rotation of the indicatorand may be arranged on a rotation axis (see reference numeral 222 ofFIG. 31) provided at the radial center portion of the radial pattern. Ofcourse, according to some embodiments, the light source 30 may bearranged in the radial center portion of the radial pattern in a buriedstate by resin and the like without being arranged on the rotation axis.

According to the present embodiment, the light incident from the radialcenter portion of the radial pattern 22 is guided to the inside of thebase member 10 and is reflected from each pattern unit of the radialpattern 22. The light reflected from each pattern unit may be reproducedas beams having different kinds of brightness according to a relativedistance with the light source. According to the operation of the radialpattern, the display device 100 may simply implement the light incidentfrom the light source to the radial pattern 22 as three-dimensionallighting having a size corresponding to an area of the radial pattern.

FIG. 19 is a front view of the display device of FIG. 18.

Referring to FIG. 19, in the display device according to the presentembodiment, the radial pattern 22 provided on one surface of the basemember 10 has a plurality of unit patterns having a predetermined pitchd3 in a radial direction R with respect to the light source 30 arrangedat a radial central portion.

This unit pattern arrangement may have substantially the same shape in astraight line (a straight line extending in a radial direction, see BL0of FIG. 4) passing through the radial pattern 22 via the radial centerportion. Also, in consideration of the operational principle of theradial pattern, images of a specific sign or word may bethree-dimensionally displayed by changing a pitch of the pattern or apattern shape (see FIGS. 28 and 30).

As such, according to the present embodiment, the three-dimensionalstereoscopic display device capable displaying stereoscopic images andhaving the easy of production may be efficiently provided.

FIG. 20 is a partially exploded front view showing a modified example ofthe display device of FIG. 19.

Referring to FIG. 20, the display device according to the presentembodiment has a base layer 101, a radial pattern layer 102 and areflective layer 40.

When compared to the base member 10, the base layer 101 refers to asubstrate in which the radial pattern 22 is not provided on one surfaceof the base layer. The base layer 101 may be identical to the basemember except for the fact that the radial pattern 22 is not provided onone surface of the base layer.

The radial pattern layer 102 is formed on one surface of the base layer101. The radial pattern layer 102 may be formed on one surface of thebase layer 101 with a separate material. In the present embodiment, theradial pattern layer 102 may be provided by applying a thermosettingresin or a photocurable resin to one surface of the base layer 101 andcuring the one surface of the base layer coated with the resin.

For example, the radial pattern layer 102 having the radial pattern 22may be provided by filling a mold having a mold pattern for forming theradial pattern with resin in a state of the mold being put on the baselayer 101, and thereafter curing the resin.

In the present embodiment, the base layer 101 may include a transparentfilm of PET (Polyethylene Terephthalate) and the like. The radialpattern layer 102 may include a thermosetting resin or a photocurableresin. As such, the radial pattern 22 of the present embodiment may beprovided on the base layer 101 or on one surface of the base memberusing a different production process from that for the base layer or thebase member with a different material from that of the base layer or thebase member.

FIG. 21 is a view showing various examples for a radial pattern of thedisplay device of FIG. 19.

Referring to FIG. 21, the radial pattern of the display device accordingto the present embodiment may have various pattern shapes. For example,the pattern shape of the radial pattern may include a prism-like shapeor a lenticular shape.

Specifically, the pattern shape of the radial pattern may include aprism type pattern cross section having at least two reflective surfaces121, 122 as illustrated in (A) of FIG. 21.

The reflective surfaces 121, 122 may be mirrors that completely reflectthe incident beam. Also, according to some embodiment, the reflectivesurfaces 121, 122 may be half mirrors having predetermined transmittanceand reflectance according to a production process. In this case, a partof the beam B incident to the radial pattern creates a reflective beamB1 that is reflected from an internal surface of the radial pattern atleast once, and the remaining part of the beam B creates a transmittedbeam B2 that penetrates the surface of the radial pattern. Thetransmitted beam B2 is reflected from the reflective layer so as to beincident to the inside of the radial pattern again. That is, the surfaceof the radial pattern may be a half mirror having predeterminedtransmittance and reflectance.

According to another embodiment, the radial pattern may include apattern cross section having a trapezoidal shape in which the end of aprism-shaped pattern cross section is cut as shown in (B) of FIG. 21.

According to a further embodiment, the radial pattern may include asemicircular pattern cross section having at least two reflectivesurfaces 121, 122 as illustrated in (C) of FIG. 21.

According to yet another embodiment, the radial pattern may include asemielliptical pattern cross section having the larger radius ofcurvature than that of the semicircular pattern cross section asillustrated in (D) of FIG. 21.

According to each shape of the pattern cross section described above, inthe display device according to the present embodiment, the patternshape of the radial pattern in a radial direction may include atriangular shape, a trapezoidal shape, a semicircular shape, asemielliptical shape or a connection arrangement resulting from acombination thereof.

According to the present embodiment, when the light incident from thelight source arranged in the radial center portion, the light travelsfrom the patterns adjacent to the radial center portion to the patternslocated far away from the radial center portion so that athree-dimensional stereoscopic background or image can be displayed by adifference in light reflection or concentration levels.

The radial pattern 22 of the display device according to the presentembodiment is arranged in a form in which mountain-shaped convex parts Mand valley-shaped concave parts V are alternatively disposed andradially extend from the radial center portion C (see FIG. 4). In thiscase, in the radial pattern 22, a first distance d1 between the patternsadjacent to the radial center portion in the radial direction BL0 isnarrower than a second distance LP/d2 between the patterns adjacent anedge. Also, these distances may be configured such that the distancebetween the patterns the closest to the radial center portion C and thedistance between the patterns located farthest away from the radialcenter portion C are gradually increased at a predetermined rate.According to the pattern distance arrangement of the radial pattern 22,the quantity of light reflected and scattered from the patterns adjacentto the radial center portion C may be increased, and the quantity oflight reflected and scattered from the patterns located far way from theradial center portion C may be reduced so that a three-dimensionaleffect resulting from a difference in the quantity of light can be moreimproved.

FIG. 22 is an exemplary view showing an operational state of the displaydevice of FIG. 18.

As shown in FIG. 22, when the light is irradiated from two light sources31, 32 installed in the radial center portion to the radial pattern 22via the base member, the display device according to the presentembodiment may display lighting having a three-dimensional effect havinga size corresponding to an area of the radial pattern 22. In FIG. 22,the quantity of light generated from a portion E1 adjacent to the lightsources 31, 32 is larger than that generated from a portion E2 locatedfar away from the light sources 31, 32.

As such, in the display device according to the present embodiment, theradial pattern is formed on one surface of the base member having alight guiding function, and the radial pattern is arranged so that lightcan be irradiated from the radial center portion to one side of the basemember, thereby enabling images having a three-dimensional effect to beeasily implemented in an area where the radial pattern is formed.

FIG. 23 is an exemplary view of a dashboard in which the display deviceof FIG. 22 is used as a background member.

As shown in FIG. 23, the display device of FIG. 22 may be used as abackground member of a dashboard such as a vehicle dashboard and thelike. In this case, a sign 50 of the dashboard such as a number, word orthe like may be printed on the reflective layer or the base member ormay be buried.

When the display device of the present embodiment is used as the vehicledashboard, at least one light source located in the radial centerportion of the radial pattern of the display device may be provided tobe connected to a rotation axis for rotating an indicator in aneedle-like shape that displays a vehicle speed in the vehicledashboard. In this case, the light source may be manufactured to beseparated from the base member and the reflective layer (see referencenumeral 30 of FIG. 31).

As such, the display device according to the present embodiment may beimplemented as the stereoscopic display device including the basemember, the radial pattern and the reflective layer without the lightsource according to an application product before a complete product.

FIG. 24 is a partially enlarge plan view showing the main portion of astereoscopic display device according to still another embodiment of thepresent disclosure. The main portion of FIG. 24 corresponds to anenlarged portion indicated by an alternated long and short dash line ofFIG. 18.

Referring to FIG. 24, the base member 10 of the display device accordingto the present embodiment includes a reflective surface 61 and a lightincident surface 62 provided on one side 101 facing the light source 30,respectively.

The reflective surface 61 may be provided by coating a portion of oneside of the base member 10 with a predetermined reflection material. Thereflective surface 61 may be made of the same material as the reflectionmaterial contained in the reflective layer.

The light incident surface 62 is limited by the reflective surface 61and includes a plurality of slit-like shapes extending to a thicknessdirection of the base member 10. The light incident surface 62 of theplurality of slit-like shapes may be arranged at a position provided sothat illumination can be concentrated on an area where a signal or aword to be displayed in the display device is located.

FIG. 25 is an exemplary view showing an operational state of the displaydevice of FIG. 24.

As shown in FIG. 25, the display device according to the presentembodiment may intensively display a three-dimensional stereoscopicbackground in a pre-divided area 121 based on the number 50 to bedisplayed in an application product as a background member of theapplication product (the vehicle dashboard and the like).

According to the present embodiment, the stereoscopic display devicecapable of displaying 3D stereoscopic backgrounds or images in variousdesign forms via various dashboards may be provided.

FIG. 26 is a partially enlarged plan view showing the main portion of astereoscopic display device according to still another embodiment of thepresent disclosure.

Referring to FIG. 26, the display device according to the presentembodiment includes: the base member 10; the radial pattern; thereflective layer 40; and a resin layer 70.

The resin layer 70 is filled in the separation space 103. The resinlayer 70 is provided to cover a light emitting surface of the lightsource 30. The resin layer 70 may be formed to bury the light source 30.This resin layer 70 performs a function of primarily dispersing anddiffusing light incident from the light source 30 at a front end of thebase member 10.

When the separation space 103 is filled with resin to cover at least oneportion (light emitting surface and the like) of the light source 30,light efficiency of the LED light source can be improved. That is, inthe separation space 103, when the resin layer 70 is formed to closelyattached to the light source 30, a refractive index of the resin layerused as a phosphor silicon and an optical member disposed in front ofthe LED light source is changed, namely, due to a different in therefractive index, the quantity of light emitted from the LED lightsource may be increased compared to a case in which the light isdirectly emitted to the air.

For example, in general, since the refractive index of the phosphorsilicon located on the light emitting surface of the LED light source is1.5, and the refractive index of the resin layer 70 is 1.47 (or usingresin having this refractive index), a critical angle is increased dueto a small difference in the refractive indexes of the mediums throughwhich the light of the LED light source passes. As a result, the loss oflight generated in the inside of the LED light source may be reduced sothat a relatively large amount of light can be secured from the LEDlight source.

The resin layer 70 may be made of a high heat resistant UV curing resinincluding an oligomer. A content of the oligomer may range from 40 to 50parts by weight. Also, urethane acrylate may be used as the UV curingresin without being limited thereto. In addition to this, at onematerial of epoxy acrylate, polyester acrylate, polyether acrylate,polybutadiene acrylate), and silicon acrylate may be used.

In particular, when urethane acrylate is used as an oligomer, two kindsof urethane acrylate are used in a state of being mixed so thatdifferent physical properties can be simultaneously implemented.

In such a case, the resin layer 60 may be made of a thermosetting resincontaining at least one of a polyester polyol resin, an acryl polyolresin, a hydrocarbon and/or ester solvent. A hardener may be furthercontained in this thermosetting resin in order to improve strength ofthe film of paint.

Also, the resin layer 70 may further contain at least one of a monomerand a photo initiator. Furthermore, the resin layer 70 may be made of athermosetting resin having high heat resistance.

FIG. 27 is a plan view of a stereoscopic display device according tostill another embodiment of the present disclosure.

Referring to FIG. 27, the display device according to the presentembodiment includes: the base member 10; the radial pattern 22; an imagedisplaying area 122; and the reflective layer 40. The image displayingarea 122 is displayed in a three-dimensional stereoscopic backgroundusing the radial pattern 22.

The image displaying area 122 may be a portion which the radial pattern22 is removed, or may be a portion subjected to treatment (patternsurface treatment, treatment for embedding pattern uneven parts and thelike) for removal of the function of the radial pattern 22. For example,the image displaying area 122 may be a portion in which some areas ofthe radial pattern 22 are removed in an intaglio shape according to apredetermined image ‘LG’.

In the present embodiment, even though the English word ‘LG’ isdisplayed in the image displaying area 122, the present is not limitedto this configuration. Various words, signs, designs and the like may bedisplayed in the image displaying area.

FIG. 28 is an exemplary view showing an operational state of the displaydevice of FIG. 27.

As shown in FIG. 28, the display device of the present embodimentdisplays a three-dimensional background arranged as a background of animage along with a customer's desired image on a dashboard area.

When the light of the light sources 31, 32 is incident to the radialpattern 22 provided in the dashboard area, the light has a relativelylarge scattering and diffusing property in a first radial portionadjacent to the light sources 31, 32 rather than a second radial portionlocated far away relatively from the light sources 31, 32. Thanks tothis operation, the display device of the present embodiment displaysthe three-dimensional stereoscopic background on the dashboard (vehicledashboard and the like).

FIG. 29 is a plan view of a stereoscopic display device according tostill another embodiment of the present disclosure.

Referring to FIG. 29, the display device according to the presentembodiment includes: the base member 10; the radial pattern 22; and thereflective layer 40.

The radial pattern 22 is only provided in an image displaying area. Theradial pattern 22 of the present embodiment is only formed in thedisplaying area for an image to be displayed in a predeterminedapplication product, but is not formed in a portion corresponding to abackground of the image. That is, the radial pattern 22 is provided inan embossed form based on a peripheral portion on one surface of thebase member.

The radial pattern 22 in the present embodiment is displayed as an areacorresponding to the English word ‘LG’ as an image displaying area andmay be provided as various words, signs, designs and the like withoutbeing limited thereto

FIG. 30 is an exemplary view showing an operational state of the displaydevice of FIG. 29.

As shown in FIG. 30, the display device according to the presetembodiment displays a three-dimensional stereoscopic image 123 on thebase member 10 for dispersing and scattering light of the LED lightsources 31, 32 via the radial pattern 22 arranged in an image to bedisplayed.

When the light is incident to one side of the base member 30, the lighthas a relatively large scattering and dispersing property in a firstradial pattern portion adjacent to the light source rather than a secondradial pattern portion located far away relatively form the lightsource. Thanks to this operation, the display device may display athree-dimensional stereoscopic image on the radial pattern 22.

According to the aforesaid embodiment, the stereoscopic display devicecapable of enabling an image for a sign or a design to be displayed tohave a three-dimensional stereoscopic effect by adjusting a patternshape of the radial pattern 22 or a pitch between the patterns may beprovided.

FIG. 31 is a sketchy cross-sectional view of a dashboard according to anembodiment of the present disclosure.

Referring to FIG. 31, the dashboard according to the present embodimentincludes a background member 100 and an indicator 210. Also, thedashboard may have a driving part 220 for controlling the indicator 210,and a rotation axis 222 connecting the driving part 220 and theindicator 210.

The background member 100 may include the stereoscopic display device.In such a case, the background member 100 may display athree-dimensional stereoscopic background, a three-dimensionalstereoscopic background, or a three-dimensional stereoscopic image.

The background member 100 may include: a base member; a radial patternprovided on one surface of the base member; and a reflective layer onone surface of the base member. Since the description of the backgroundmember overlaps with that of the stereoscopic display device, the detaildescription of the background member is omitted.

The indicator 210 has a needle-like shape that is rotated on thebackground member 100 at a predetermined angle according to a speed ofan object (e.g., a vehicle and the like). The indicator 210 is coupledto the rotation axis 222 arranged in a radial center portion of theradial pattern and is rotated at a predetermined angle according tocontrol of the driving part 220 intended for driving the rotation axis222. In the case of such a configuration, the light source 30irradiating light to one side of the base member may be disposed at therotation angle 222 or between the rotation axis 222 and one side of thebase member.

The light source 30 may be implemented as an LED mounted to the printedcircuit board. Here, the printed circuit board refers to a substrate inwhich a conductive circuit pattern is formed on an insulating substrateor an insulating layer. Furthermore, in order to secure flexibility, theprinted circuit board may be implemented as a flexible printed circuitboard (FPCB).

As set forth above, according to some embodiments of the presentdisclosure, the stereoscopic display device can convert an incident beaminto a line-shaped beam having a three-dimensional effect via a patterndesign and can implementing various optical images using the line-shapedbeam. This stereoscopic display device may be usefully applied to aninterior or exterior display device, a lighting device, a dashboard fora vehicle or the like.

Also, according to some embodiments of the present disclosure, thestereoscopic display device can display optical images having ageometrical shape and can be applied to an application havingflexibility and a bending portion. Furthermore, the stereoscopic displaydevice has a simple structure so that a production cost can be reduced,and durability can be improved. Also, the dashboard using thestereoscopic display device may be provided.

In particular, when the stereoscopic display device according to someembodiments of the present disclosure is used, an interior design of theinside of a vehicle can be innovatively changed and expressed. Thedashboard can express light having various colors via the LED (LightEmitting Diode) light source.

Furthermore, according to some embodiments of the present disclosure,the stereoscopic display device can show a geometrical 3D effect withthree-dimensional light distribution by structurally concentrating theincident beam via a pattern design.

Also, according to some embodiments of the present disclosure, it can beprovided with the stereoscopic display device that can have a functionof changing the shape and three-dimensional effect of light according toa viewing angle by using a flexible resin layer in the light guidemember and can be easily applied to an application having a bendingportion such as a flexible housing.

Also, according to some embodiment of the present disclosure, it can beprovided with the stereoscopic display device that can easily implementvarious designs using an optical image having a three-dimensionaleffect, and the three-dimensional stereoscopic dashboard.

As previously described, in the detailed description of the disclosure,having described the detailed exemplary embodiments of the disclosure,it should be apparent that modifications and variations can be made bypersons skilled without deviating from the spirit or scope of thedisclosure. Therefore, it is to be understood that the foregoing isillustrative of the present disclosure and is not to be construed aslimited to the specific embodiments disclosed, and that modifications tothe disclosed embodiments, as well as other embodiments, are intended tobe included within the scope of the appended claims and theirequivalents.

An aspect of embodiments of the present disclosure provides astereoscopic display device that can convert incident light into aline-shaped beam having a three-dimensional effect via a pattern designand can implement various optical images using the line-shaped beam.

An another aspect of embodiments of the present disclosure provides astereoscopic display device that can display an optical image having ageometrical form rather than a simple light emission form and can beeasily applied to an application having flexibility or a curve, and adashboard using the stereoscopic display device.

A further aspect of embodiments of the present disclosure provides astereoscopic display device that can provide various design effectsusing optical images having a three-dimensional effect, and a dashboardusing the stereoscopic display device.

According to an aspect of embodiments of the present disclosure, astereoscopic display device may include: a base substrate transmittingan incident beam; and a three-dimensional effect forming part on a firstsurface of the base substrate, wherein the three-dimensional effectforming part has a pattern, the pattern having multiple pattern unitsarranged in a first direction, each of the pattern units having aninclined surface having an inclination angle with respect to the firstsurface, wherein when an incident beam is incident to a central portionof the pattern, the pattern guides the incident beam in a first surfacedirection toward which the first surface looks or a second surfacedirection toward which a second surface opposite to the first surfacelooks, thereby implementing a line-shaped beam having athree-dimensional effect in a first path resulting a pattern arrangementdirection.

In one embodiment, the stereoscopic display device may further include:a light source disposed in the central portion of the pattern; and adriving part rotating the light source at the central portion.

In one embodiment, the light source may include a plurality of sub-lightsources that irradiates an incident beam from the central portion of thepattern in different radial directions.

According to another aspect of embodiments of the present disclosure, astereoscopic display device may include: a base substrate transmittingan incident beam; and a three-dimensional effect forming part on a firstsurface of the base substrate, wherein the three-dimensional effectforming part has a pattern, the pattern having multiple pattern unitsarranged in a first direction, each of the pattern units having aninclined surface having an inclination angle with respect to the firstsurface, wherein when an incident beam is incident to a central portionof the pattern, the pattern guides the incident beam in a first surfacedirection toward which the first surface looks or a second surfacedirection toward which a second surface opposite to the first surfacelooks, thereby implementing a line-shaped beam having athree-dimensional effect in a first path resulting a pattern arrangementdirection.

In one embodiment, the stereoscopic display device may further include alight source disposed at one end of the pattern on the base substrate.Here, the base substrate has a rod or needle-like shape and supports thethree-dimensional effect forming part and the light source.

In one embodiment, the stereoscopic display device may further include adriving part connected to the base substrate. The driving part mayrotate the base substrate in a circular or elliptical shape based on theone end of the based substrate on which the light source is disposed.

In one embodiment, the base substrate may include a first basesubstrate, a second base substrate and a third base substrate eachhaving a rod or needle-like shape, the three-dimensional effect formingpart may include a first three-dimensional effect forming part, a secondthree-dimensional effect forming part, and a third three-dimensionaleffect forming part, and the light source may include a first lightsource, a second light source and a third light source and a fourthlight source that are disposed at one end of the pattern and irradiatean incident beam from the one end to another end. Here, the first basesubstrate, the second base substrate and the third base substrate may bedisposed such that the first light source, the second light source andthe third light source are installed in a central portion of a printingpart having a circular or elliptical shape and irradiate the incidentbeam from the central portion to different directions.

In one embodiment, the stereoscopic display device may further include acontrol part selectively controlling the first to third light sources.

According to a further aspect of embodiments of the present disclosure,a dash board using the stereoscopic display device according to any oneof the aforesaid embodiments may be provided. Here, the stereoscopicdisplay device may be connected to a vehicle controller or a vehiclebattery and may be operated by power of the vehicle battery.

According to yet another aspect of embodiments of the presentdisclosure, a stereoscopic display device may include: a base memberhaving one surface on which a radial pattern is provided; and areflective layer on the one surface of the base member.

In one embodiment, a pattern shape of the radial pattern may be a prismor lenticular form.

In one embodiment, a pattern shape of the radial pattern in a radialdirection may include a triangular shape, a trapezoidal shape, asemicircular shape, a semielliptical shape or a connection arrangementresulting from a combination thereof.

In one embodiment, a surface of the radial pattern may be a half mirrorhaving a predetermined refractive index and a predetermined reflectiveindex.

In one embodiment, a first distance between patterns adjacent to theradial center portion in a radial direction of the radial pattern may besmaller than a second distance between patterns located far awayrelatively from the radial center portion.

In one embodiment, the reflective layer may contain Al, Ag, a whitematerial or a combination thereof.

In one embodiment, the stereoscopic display device may further include alight source disposed in a radial center portion of the radial pattern.

In one embodiment, the stereoscopic display device may further include aseparation part between one side of the base member and the lightsource,

In one embodiment, the one side of the base member may include a lightincident surface and a reflective surface. Here, the light incidentsurface may be limited by the reflective surface and may have aplurality of slit-like shapes extending in a thickness direction of thebase member.

In one embodiment, the stereoscopic display device may further includeresin filled in the separation part.

In one embodiment, a material of the base member may be acryl resin.Also, the material of the base member may be polycarbonate (PC),polymethylmethacrylate (PMMA) or polystyrene (PS).

In one embodiment, a surface of the radial pattern may be a mirror-likefinishing surface and may have an arithmetic mean roughness (Ra) of 0.02or less and a maximum height roughness (Ry) of 0.15 to 0.30 or less.

In one embodiment, the radial pattern may be provided on one surface ofthe base member with a different material from that of the base member.

In one embodiment, a material of the radial pattern may be athermosetting resin or a photocurable resin.

In one embodiment, the stereoscopic display device may further includean image displaying area having an embossed shape resulting fromremoving a partial area of the radial pattern.

In one embodiment, the radial pattern may be only provided in the imagedisplay area having the embossed shape on the base member.

According to still another aspect of embodiments of the presentdisclosure, a stereoscopic dashboard may include a background memberincluding a stereoscopic display device of any one of the aforesaidembodiments; and an indicator having a needle-like shape that is rotatedon the background member at a predetermined angle according to a speedof an object. Here, the object may be a vehicle.

Any reference in this specification to “one embodiment,” “anembodiment,” “example embodiment,” etc., means that a particularfeature, structure, or characteristic described in connection with theembodiment is included in at least one embodiment of the invention. Theappearances of such phrases in various places in the specification arenot necessarily all referring to the same embodiment. Further, when aparticular feature, structure, or characteristic is described inconnection with any embodiment, it is submitted that it is within thepurview of one skilled in the art to effect such feature, structure, orcharacteristic in connection with other ones of the embodiments.

Although embodiments have been described with reference to a number ofillustrative embodiments thereof, it should be understood that numerousother modifications and embodiments can be devised by those skilled inthe art that will fall within the spirit and scope of the principles ofthis disclosure. More particularly, various variations and modificationsare possible in the component parts and/or arrangements of the subjectcombination arrangement within the scope of the disclosure, the drawingsand the appended claims. In addition to variations and modifications inthe component parts and/or arrangements, alternative uses will also beapparent to those skilled in the art.

What is claimed is:
 1. A stereoscopic display device, comprising: a basesubstrate transmitting an incident beam of a light source; athree-dimensional effect forming part on a first surface of the basesubstrate; and a driving part to rotate the light source, wherein thethree-dimensional effect forming part has a pattern, the pattern havingmultiple pattern units arranged in a first direction, each of thepattern units having an inclined surface having an inclination anglewith respect to the first surface, wherein when an incident beam isincident to a central portion of the pattern, the pattern guides theincident beam in a first surface direction toward which the firstsurface looks or a second surface direction toward which a secondsurface opposite to the first surface looks, thereby displaying aline-shaped beam having a three-dimensional effect in a first pathresulting a pattern arrangement direction, wherein the light source isdisposed in the central portion of the pattern, and the driving partrotates the light source at the central portion so as to rotate theline-shaped beam in an extending direction of the multiple patternunits.
 2. The stereoscopic display device of claim 1, wherein theinclined surface is a mirror-like finishing surface and has anarithmetic mean roughness (Ra) of 0.02 or less and a maximum heightroughness (Ry) of 0.30 or less.
 3. The stereoscopic display device ofclaim 2, wherein a width or a pitch between two adjacent pattern unitsof the pattern ranges from 10 to 500 μm, a first pitch of a firstpattern of a first pattern area adjacent to a central portion of thepattern in a radial direction is different from a second pitch of asecond pattern of a second pattern area adjacent to an edge of thepattern.
 4. The stereoscopic display device of claim 1, wherein the basesubstrate is a resin layer, and the three-dimensional effect formingpart is provided as a pattern layer bonded to the first surface of thebase substrate.
 5. The stereoscopic display device of claim 4, whereinthe pattern is provided on a first surface of the pattern layer, and asecond surface opposite to the first surface of the pattern layer isbonded to the first surface of the base substrate.
 6. The stereoscopicdisplay device of claim 5, further comprising a reflective layer on thefirst surface of the pattern layer.
 7. The stereoscopic display deviceof claim 6, comprising a separation area, an adhesive pattern, areflective pattern or a combination thereof between the pattern and thereflective layer.
 8. The stereoscopic display device of claim 1, furthercomprising a separation layer between the pattern and the basesubstrate, wherein the base substrate is a resin layer, thethree-dimensional effect forming part is provided as a pattern layerbonded to the first surface of the base substrate, the pattern isprovided on the first surface of the pattern layer, the separation layeris mounted to the first surface of the pattern layer, and the firstsurface of the pattern layer is buried by the resin layer.
 9. Thestereoscopic display device of claim 1, wherein the light sourceemitting the incident beam comprises a plurality of sub-light sourcesthat irradiates the incident beam from the central portion of thepattern in different radial directions.
 10. The stereoscopic displaydevice of claim 1, wherein the base substrate and the three-dimensionaleffect forming part are provided with a single substrate, and thethree-dimensional effect forming part is arranged in the inside or on asurface of the single substrate.
 11. The stereoscopic display device ofclaim 1, wherein the light source is disposed at one end of the patternon the base substrate, wherein the base substrate has a rod orneedle-like shape and supports the three-dimensional effect forming partand the light source.
 12. The stereoscopic display device of claim 11,wherein the driving part rotates the base substrate in a circular orelliptical shape based on the one end of the based substrate on whichthe light source is disposed.
 13. The stereoscopic display device ofclaim 11, wherein the base substrate comprises a first base substrate, asecond base substrate and a third base substrate each having a rod orneedle-like shape, the three-dimensional effect forming part comprises:a first three-dimensional effect forming part having a first patternarranged on a first surface of the first base substrate; a secondthree-dimensional effect forming part having a second pattern arrangedon a first surface of the second base substrate; and a thirdthree-dimensional effect forming part having a third pattern arranged ona first surface of the third base substrate, and the light sourcecomprises: a first light source disposed at one end of the first patternand irradiating a first incident beam from the one end to another end; asecond light source disposed at one end of the second pattern andirradiating a second incident beam from the one end to another end; athird light source disposed at one end of the third pattern andirradiating a third incident beam from the one end to another end,wherein the first base substrate, the second base substrate and thethird base substrate are disposed such that the first light source, thesecond light source and the third light source are installed in acentral portion of a printing part having a circular or ellipticalshape, and irradiate the incident beam from the central portion todifferent directions.